health and fitness calculators Tools

Find out your biological age based on 7 key lifestyle factors: BMI, exercise, sleep, smoking, diet, stress, and alcohol. Compare to your chronological age and get a personalised factor breakdown.

Blood type calculator shows which ABO and Rh blood types a child can inherit from two parents, with probability ranges and the types that are impossible. Free, no signup.

Calculate your Body Mass Index (BMI) instantly. Get health category, healthy weight range, and personalized insights based on your height and weight.

Estimate your basal metabolic rate and daily maintenance calories using the Mifflin-St Jeor formula. Supports metric and imperial units for accurate TDEE planning.

Calculate your daily calorie needs based on age, gender, height, weight, and activity level. Get personalized targets for weight loss, maintenance, or muscle gain with macro breakdown.

Calculate calories burned during any exercise using MET values from the Compendium of Physical Activities. Covers 30+ activities including walking, running, cycling, swimming, sports, and daily tasks.

Discover your chronotype with a 10-question quiz based on Dr. Breus's sleep science framework. Get your ideal wake time, peak productivity window, best exercise time, and the perfect IF eating window for your biology.

Assess your cortisol load with 15 symptoms across energy, sleep, weight, mood, digestion, and immunity. Get a score, dimension breakdown, and evidence-based recommendations including your optimal IF eating window.

Build cURL commands with method, headers, query params, auth, and body. Generate copy-ready shell requests for APIs and debugging.

Energy converter for Joules, calories, kilowatt-hours, BTU, and more. Instant results for physics or nutrition - free, browser-based, no signup.

Calculate your daily electrolyte targets during intermittent or extended fasting. Personalized for body weight, activity level, keto status, and sweat rate. Includes a morning/midday/evening dosing schedule.

Plans your personalized 5-day Fasting Mimicking Diet cycle based on Dr. Valter Longo's protocol. Calculates calorie and macro targets for each day adjusted for your body weight and goal.

Calculate your Glucose Ketone Index (GKI) from blood glucose and ketone readings. See your metabolic zone on the Seyfried scale and get goal-aligned guidance for weight loss, longevity, or therapeutic ketosis.

Calculate your 5 heart rate training zones using Fox, Tanaka, or Karvonen methods. Find your fat burning zone, aerobic zone, and max heart rate for optimized cardio workouts.

Calculate your ideal body weight using four medical formulas - Hamwi, Devine, Robinson, and Miller. Enter your height and gender to see a recommended healthy weight range.

Calculate your HOMA-IR score to assess insulin resistance using fasting blood glucose and insulin values. Includes QUICKI index, five-tier interpretation, and personalised diet and lifestyle recommendations.

Calculate your personalized ketogenic diet macros - fat, protein, and net carbs - based on your body stats and goals. Uses Mifflin-St Jeor or Katch-McArdle formula with ketosis likelihood indicator.

Generate Kubernetes Deployment and Service YAML manifests from a simple form. Supports resource limits, health probes, env vars, and multi-replica configs. Free, no signup.

Estimate your life expectancy using 10 evidence-based longevity factors including exercise, diet, smoking, sleep, stress, and social connection. See milestone reachability and lifestyle adjustments.

Calculate your ideal daily macronutrient targets - protein, carbs, and fat - using the Mifflin-St Jeor equation. Set your goal (cut, bulk, maintain) and diet type to get accurate calorie and macro breakdowns.

Create mailto links with pre-filled recipients, subject, and body. Generate HTML email links for contact buttons and support pages.

Calculate your estimated due date based on your last menstrual period, conception date, IVF transfer, or ultrasound. Track pregnancy progress with trimester timeline and milestones.

Calculate your optimal daily protein intake based on weight, fitness goal, activity level, and age. Covers goals from RDA minimum to muscle building and athletic performance, with per-meal breakdown.

Calculates a week-by-week calorie increase schedule to safely restore your metabolism after dieting or fasting, preventing fat regain while returning to maintenance calories.

Calculate the best bedtime or wake-up time based on 90-minute sleep cycles. Find out when to sleep or wake up to feel fully rested and avoid grogginess.

Calculate your Total Daily Energy Expenditure (TDEE) and BMR using the Mifflin-St Jeor equation. Get daily calorie targets for weight loss, maintenance, and muscle gain.

Estimate your visceral fat area (VFA in cm²) using the Samouda anthropometric model - no blood test required. Get your risk level, waist-to-height ratio, and a personalised fat-loss action plan.

Calculate your waist-to-hip ratio (WHR) using WHO standards to assess cardiovascular health risk. Identifies apple vs pear body shape and provides risk categories for men and women.

Calculate how much water you should drink daily based on your body weight, activity level, and climate. Get personalized hydration recommendations in liters, ounces, and glasses.

Calculate exactly how long it will take to reach your goal weight. Uses TDEE and your preferred weekly deficit to project a goal date, daily calorie target, and milestone timeline.